I don't tend to re-read books (Lord of The Rings being a notable exception). However one of the prompts on my reading challenges this year was to revisit a book I enjoyed. I decided to revist The Library of Babel because 1) it's incredibly short, so doesn't cut into my other reading goals, and 2) I distinctly remember being in absolute awe after I first read it. I wondered how it might feel upon second reading. I definitely didn't have the same reaction as first time, maybe because the impact was lessened. Like the second time you see Fight Club for example, the big twist or, more accurately here, the big philosophical concept is expected so doesn't pack the same punch.

The Library of Babel ultimately can be described as a story that exposes the absurd futility of humanity's attempt to understand everything, when there is so much to comprehend; an potentially infinite amount. I enjoy this conceptualisation of infinity, or an asymptote curve of knowledge aquisition. I also enjoy the exploration of essentialism vs existentialism of the people within the library... The 'factions', the ones who are drawn to chance, the methodical ones, the violent ones, the ones who lost the will to live.

Another StoryGraph user 'Graceigrace1178', has a longer review covering more philosophical elements focussing on nihilsm. And I particuarly like this quote from another review I found on the internet:
 

It deserves praise for the amount of discussion it can ignite and variety of philosophical concepts it introduces. Plus the imagery of the library itself and the architexture is stunning! 9 pages long, free PDF on the internet, this is an easily accessible gem of a book.